Most full private servers operate on a "donation" model or a "VP" (Vote Point) system. Instead of swiping a credit card for a 1% stat boost, you log in daily, vote for the server on TopG or similar listing sites, and receive thousands of free Gems/Balens.
: Official developers like 7Road have historically clashed with third-party platforms over the use of art resources and character data, leading to a fragmented player base.
While the "free everything" model sounds like paradise, there are significant downsides that players must accept.